Apparatus for aerating liquids.



UNITED STATES PATENT OFFICE.

JOHN GWYNNE AND EDWARD WASHBOURN SARGEANT, OF HAMMERSMITI-I, ENGLAND.

APPARATUS FOR AERATING VLl Q.'U`| DS.

SPECIFICATION forming part of Letters Patent No. 721,036, dated February 17, 1903. Application filed November 19, 1901. Serial No. 821945. (No model.) I

To all whom it may concern: l

Beit known that we, JOHN GWYNNE and EDWARD WAsHBoURN SARGEANT, subjects of the King of Great Britain and Ireland, residing at Hammersmith, in the county of Middlesex, England, haveinvented Improvements in Means for Aerating Liquids,of which the following is a specification.

It is sometimes desirable to introduce air into liquidsfor example', into chemical solutions, which in order that 'che proper reactions may take place require the presence of air-and this invention has reference to improvements in means for introducing airv into liquid in such a manner that it shallv become intermingled with and dispersed through the liquid rto be aerated. For 'this purpose a centrifugal pump, which may have its suction-pipe connected to the bottom of a liquid-containing tank and its delivery-pipe to a perforated pipe arranged in the upper part of said tank, is provided with a device comprising a liquid-inlet nozzle, an air-inlet passage or space, and a combining-nozzle and adapted to have the liquid pumped through it by the pump, the construction of the de- Vice being such that air will be drawn into and caused to mingle with the liquid by the action of the said liquid passing through the device at a high velocity.

Referring to the accompanying illustrative drawings, Figures l and 2 are elevations at right angles to each other of apparatus according to this invention, and Fig. 3 is a sectional View of the device whereby air is admitted to the suction-pipe of the pumps.

lis the centrifugal pump; 2, the liquidcontaining tank; 3, the delivery-pipe of the pump; 4, the perforated pipe connected to or forming part of the said delivery-pipe and extending lengthwise of the tank 2 below the level of the liquid therein. ,Y

5 is the pump suction-pipe, which is connected to the bottom of the tank 2 and is tted with the device illustrated in Fig. 3, the suction-pipe being contracted toward the said device on each side thereof, as shown in Fig.

driven. f

The operation vis as follows: The tank 2 being charged with liquid and the cock 10 being closed, the pump is started and the liquid 6o pumped from the tank 2 through the nozzles 6 and 7. When the pump has attained the required speed, the cock I0 is opened, whereupon .the liquid flowing at a high velocity from the nozzle 6 to the nozzle 7 draws through 65 the space 8 a supply of air, which mixes with the liquid passed through the pump and delivered into the tank through the perforated pipe Ll, the result 'being that the liquid will become thoroughly aerated.

What we claim is- 1. In means'for aerating liquids, the combination of a liquid-containing tank, a centrifugal pump the suction-pipe of which is connected to said tank, a device comprising a liquid-inlet nozzle and a surroundingcom- 1mining-nozzle, said nozzles beingseparated by an intervening air-inlet passage in communication with the atmosphere, and a deliverypipe adapted to discharge into said tank, as set forth.

2. In means for aerating liquids, the combination of a liquid-containing tank, a centrifugal pump, the suction-pipe of which isl connected to said tank, a device comprising aliquid-inlet nozzle and a surrounding combining-nozzle, said nozzles bein g separated by an intervening ar-inlet-passage in communication with the atmosphere, and a perforated delivery-pipe adapted to discharge into said tank, Yas set forth.

3. Inl means for aerating liquids, the combination of a centrifugal pump, a liquid-containing tank, a perforated delivery-pipe arranged below the level of the liquid in said Signed at 77 Cornhill, London, England, tank, a suction-pipe connected to the bottom this 4th day of November, 1901. of the tank and a device fitted in said suo- JOHN GWYNNE tion-pipe and comprising a liquid-inlet nozg 5 zle and a surrounding combining-nozzle, said EDWARD WASHBOURN SARGEANT' nozzles being separated by an intervening Witnesses: air-inlet passage communicating with the at- PERCY E. MATTOCKS, `mosphere through a cock, as set forth. EDMUND S. SNEWIN. 

